CN103723683B - High concentration oxygen generator - Google Patents
High concentration oxygen generator Download PDFInfo
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- CN103723683B CN103723683B CN201310688401.6A CN201310688401A CN103723683B CN 103723683 B CN103723683 B CN 103723683B CN 201310688401 A CN201310688401 A CN 201310688401A CN 103723683 B CN103723683 B CN 103723683B
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Abstract
The invention discloses a high concentration oxygen generator. Oxygen gas is prepared by adopting a CPU to control all switches and the closing of valves, due to variation of all parameters during an oxygen production process or errors caused by equipment, the oxygen concentration is variable, therefore, the judgment can be performed through a first oxygen sensor and a second oxygen sensor, when the concentration of the prepared oxygen gas is higher than a set valve, the oxygen gas is stored into an oxygen storage tank, otherwise, the oxygen gas enters an air filter for further filtering so as to obtain high concentration oxygen gas, and the use of the oxygen generator is more flexible. A third oxygen sensor is used for feeding back oxygen concentration in an environment in real time, so that the CUP can conveniently control the closing of a pressure regulating valve, and further the better oxygen concentration can be maintained.
Description
Technical field
The present invention relates to a kind of High concentration oxygen generator.
Background technology
Oxygenerator can be used for medical treatment, chemical industry, highlands, metallurgy, papermaking, biotechnology etc. every field, stricter to the concentration requirement of oxygen in some application of wherein medical treatment, chemical industry, metallurgy, biotechnology, oxygen is needed to keep high density, if oxygen concentration is lower than after certain value, chemical reaction can be affected or cause " anoxic " phenomenon.
Summary of the invention
For the problems referred to above, the invention provides a kind of High concentration oxygen generator, the oxygen concentration of output is high, further, monitors the oxygen concentration in environment, makes the oxygen of environment keep high density.
For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the present invention is achieved through the following technical solutions:
A kind of High concentration oxygen generator, it is characterized in that, comprise the air filter be connected in turn, admission air silencer, compressor, condenser, throttling valve, first point of gas control valve and second point of gas control valve is provided with between described condenser and throttling valve, described first point of gas control valve is connected with CPU with second point of gas control valve, described first point of gas control valve is connected with the first pneumavalve, described first pneumavalve is connected with the first adsorbing tower with molecular sieve, described second point of gas control valve is connected with the second pneumavalve, described second pneumavalve is connected with the second adsorbing tower with molecular sieve, described first pneumavalve is connected with exhaust snubber with the outlet of the second pneumavalve, equalizing valve is provided with between described first adsorbing tower with molecular sieve and the second adsorbing tower with molecular sieve, described equalizing valve is connected with CPU, described first adsorbing tower with molecular sieve is connected with the first oxygen sensor, described second adsorbing tower with molecular sieve is connected with the second oxygen sensor, described first oxygen sensor is connected with the 3rd switch with the first switch respectively, described second oxygen sensor is connected with the 3rd switch with second switch respectively, described first switch is connected with oxygen container by the first check valve, described second switch is connected with oxygen container by the second check valve, described 3rd switch is connected with air filter by the 3rd check valve, described first switch, second switch is all connected with CPU with the 3rd switch, the outlet of described oxygen container is connected with relief valve, strainer, oxygen flow meter, humidifying cup successively, and finally discharge through oxygen exhaust, described relief valve is connected with CPU.Preferred described High concentration oxygen generator also comprises the 3rd oxygen sensor of oxygen concentration in measurement environment, and described 3rd oxygen sensor is connected with CPU.
The closed of each switch and valve is control by CPU, obtained oxygen, because parameters in oxygen preparation can change, or the reason of equipment causes error, the concentration of obtained oxygen is not invariable, therefore can be judged by the first oxygen sensor and the second oxygen sensor, when obtained oxygen concentration is greater than the value of setting, oxygen is stored in oxygen container, otherwise enter in air filter and carry out further filtering with the oxygen obtaining high density, equipment use is more flexible.3rd oxygen sensor is used for oxygen concentration real-time in feedback environment, facilitates CPU to control the closed of relief valve, and then maintains preferably oxygen concentration.
The invention has the beneficial effects as follows: the oxygen concentration of output is high, the oxygen for lower concentration then filters once again, ensure that the concentration stabilize exporting oxygen.Further, the oxygen concentration in environment is monitored, make environment maintain preferably oxygen concentration.Easy to use, handiness is higher.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of High concentration oxygen generator of the present invention;
Fig. 2 is the effect diagram of adsorption cycle to oxygen concn;
Fig. 3 all presses the time to the effect diagram of oxygen concn;
Fig. 4 is the effect diagram of rate of discharge to oxygen concn;
Fig. 5 is adsorption cycle and the correlation diagram of all pressing the time;
Fig. 6 is the correlation diagram of adsorption cycle and rate of discharge.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, technical solution of the present invention is described in further detail, can better understand the present invention to make those skilled in the art and can be implemented, but illustrated embodiment is not as a limitation of the invention.
As shown in Figure 1, a kind of High concentration oxygen generator, comprise the air filter be connected in turn, admission air silencer, compressor, condenser, throttling valve, first point of gas control valve and second point of gas control valve is provided with between described condenser and throttling valve, described first point of gas control valve is connected with CPU with second point of gas control valve, described first point of gas control valve is connected with the first pneumavalve, described first pneumavalve is connected with the first adsorbing tower with molecular sieve, described second point of gas control valve is connected with the second pneumavalve, described second pneumavalve is connected with the second adsorbing tower with molecular sieve, described first pneumavalve is connected with exhaust snubber with the outlet of the second pneumavalve, equalizing valve is provided with between described first adsorbing tower with molecular sieve and the second adsorbing tower with molecular sieve, described equalizing valve is connected with CPU, described first adsorbing tower with molecular sieve is connected with the first oxygen sensor, described second adsorbing tower with molecular sieve is connected with the second oxygen sensor, described first oxygen sensor is connected with the 3rd switch with the first switch respectively, described second oxygen sensor is connected with the 3rd switch with second switch respectively, described first switch is connected with oxygen container by the first check valve, described second switch is connected with oxygen container by the second check valve, described 3rd switch is connected with air filter by the 3rd check valve, described first switch, second switch is all connected with CPU with the 3rd switch, the outlet of described oxygen container is connected with relief valve, strainer, oxygen flow meter, humidifying cup successively, and finally discharge through oxygen exhaust, described relief valve is connected with CPU.Preferred described High concentration oxygen generator also comprises the 3rd oxygen sensor of oxygen concentration in measurement environment, and described 3rd oxygen sensor is connected with CPU.
Its specific works process is as follows: first air filters through air filter, filter out koniology and solid impurity, admission air silencer can reduce noise, air is successively through overdraft and condensation, the liquid produced is atomized discharge by throttling valve, remaining part enters first point of gas control valve or second point of gas control valve by the control of CPU, nitrogen is wherein discharged by the first pneumavalve and the second pneumavalve, same, in order to reduce noise, venting port is provided with exhaust snubber, in air, remaining composition will be transported to the first adsorbing tower with molecular sieve by the first pneumavalve and the second pneumavalve or the second adsorbing tower with molecular sieve carries out final oxygen and nitrogen separation, wherein the first adsorbing tower with molecular sieve or the second adsorbing tower with molecular sieve are made up of the molecular sieve of selective adsorption nitrogen.Nitrogen after first adsorbing tower with molecular sieve is separated is transported to the first pneumavalve and the second pneumavalve and finally discharges through exhaust snubber.
Oxygen after first adsorbing tower with molecular sieve is separated carries out the measurement of oxygen concentration through the first oxygen sensor, CPU controls the closed of the first switch and the 3rd switch according to the concentration of feedback, namely when the concentration value of oxygen is greater than the value of setting, CPU controls the first switch opens, and the 3rd switch disconnects; When the concentration value of oxygen is less than the value of setting, then CPU controls the first switch disconnection, the 3rd switch opens.Same, oxygen after second adsorbing tower with molecular sieve is separated carries out the measurement of oxygen concentration through the second oxygen sensor, CPU is according to the concentration control second switch of feedback and the closed of the 3rd switch, namely when the concentration value of oxygen is greater than the value of setting, CPU controls second switch and opens, and the 3rd switch disconnects, when the concentration value of oxygen is less than the value of setting, then CPU controls second switch disconnection, the 3rd switch opens.The oxygen of final oxygen container store high concentrations, and the oxygen of lower concentration enters air filter carries out next circulating filtration, and then the oxygen of high density can be obtained at short notice, equipment use is more flexible.3rd oxygen sensor is used for oxygen concentration real-time in feedback environment, facilitates CPU to control the closed of relief valve, and then maintains preferably oxygen concentration.
Wherein, adsorption cycle, all press time, outlet oxygen pressure and system working pressure all to affect the concentration of obtained oxygen, therefore can control the closed of each switch and valve by CPU, the oxygen of obtained two kinds of different concns.Its concrete influence factor is as follows:
1) take oxygen concn as research object, adopt and experimentally investigate adsorption cycle in circulation oxygen preparation, all press time and rate of discharge on the impact of oxygen concn.
The compressor power of experiment oxygenerator is about 280W, and single tower molecular sieve consumption is 0.6Kg, and the aspect ratio of adsorption tower is 5.6, and molecular sieve uses LiX type, test ambient temperature 25 degree.The oxygen concn tester used requires the time of response to be less than 8 seconds.Adsorption cycle adopts these 7 parameters of 5S, 6S, 7S, 8S, 9S, 10S, 11S, 12S, 13S, all press the time adopt 0.4S, 0.6S, 0.7S, 0.8S, 0.9, these 8 time parameters of 1.1S, 1.3S, 1.5S, outlet oxygen flow adopts these 4 flows of 1L/2L/3L/4Lmin, concrete outcome is in table 1 and table 2, and wherein each state verification is averaged for 3 times.
Table 1, all press time and rate of discharge and corresponding oxygen concn
Table 2, adsorption cycle and rate of discharge and corresponding oxygen concn
2) experiment of single factor data analysis
A) adsorption cycle impact: the data set adopting 2L/min in table 2, with polynomial expression nonlinear least-square curve simulation, all presses the 0.8S that remains unchanged.The simulation curve of 4 groups of data and the very similar of 2L/min, reduce again along with adsorption cycle increases after oxygen concn increases before this, there is an extreme point, particular content is shown in Fig. 2.The analysis of causes: the pressure of adsorption bed changes between 0 ~ 0.2MPs in the working cycle of the sorption and desorption of molecular sieve oxygen generation.In this pressure range, molecular sieve can regard linear relationship as to the absorption of nitrogen.When adsorption cycle is shorter, switch pressure also lower, the adsorptive capacity of molecular sieve to nitrogen is few, so oxygen-producing amount is also less.Adsorption cycle is short in addition, and the sorption and desorption time just shortens, and sorption and desorption is incomplete, so oxygen concn is also lower.When adsorption cycle increases, switching pressure also increases, and the sorption and desorption time also increases, and sorption and desorption is more abundant, so produce oxygen and oxygen concn increase.After oxygen level reaches maximum value, then increase adsorption cycle, the absorption of molecular sieve to nitrogen reaches capacity, and nitrogen will puncture molecular sieve and oxygen content is reduced.Best adsorption cycle can be found by experiment.
B) all press the impact of time: the data set adopting 2L/min in table 1, with polynomial expression nonlinear least-square curve simulation, adsorption cycle remains unchanged 8S.The simulation curve of 4 groups of data and the very similar of 2L/min, particular content is shown in Fig. 3, slowly reduces again, there is an extreme point along with the time of all pressing increases after oxygen concn first increases.The analysis of causes: adsorption column outlet place is the oxygen of high-content, when adsorption tower switches because the exit oxygen level of another adsorption tower (desorb is complete) just entering adsorbed state is increase of starting from scratch, the oxygen concn causing oxygen exhaust in this process has the phenomenon of an instantaneous minimizing.Equal baric flow journey is exactly before adsorption cycle terminates, allow the current adsorption tower being in adsorbed state continue absorption, and makes the complete adsorption tower of another desorb also enter adsorbed state simultaneously, would not have the phenomenon of minimizing like this at the oxygen concn of oxygen exhaust.Have two kinds for the mode of all pressing, one is single-ended all pressures (adsorption tower inlet end), and another kind is that two ends are all pressed.Single-ended all pressure is generally utilize sorption and desorption Controlling solenoid valve to carry out the control of time and sequential at inlet end, and both-end is all pressed and will be increased a magnetic valve in outlet side.Experiment proves that the rate of recovery that both-end is all pressed and oxygen level are all higher than single-ended equal baric flow journey.Both-end is all pressed and the equal pressure electromagnetic valve in outlet side can be utilized to extend all press the time (time of setting up a call), and after all having pressed, wherein a part of product oxygen enters and starts in the adsorption tower of desorb, strengthens washing adsorption bed blowback thus improving the desorb degree in tower.All the time is pressed to have certain value, after having exceeded definite value, oxygen level no longer improves, because the Nitrogen adsorption capacity of the adsorption tower be not desorbed is saturated along with all pressing time lengthening to enter, blowback cleaning will be used up a part of product oxygen in addition, so the time of all pressing oversizely can reduce oxygen level on the contrary.
C) impact of rate of discharge: the data set adopting adsorption cycle 8S in table 2, all presses the 0.8S that remains unchanged.Simulate rate of discharge to the relation curve of oxygen concn, as shown in Figure 4.Oxygen concn can improve along with the minimizing of rate of discharge as can see from Figure 4, but can reduce along with flow and reduce again after arriving certain value.The analysis of causes: because the pressure in adsorption tower be by charge flow rate with go out the pressure difference that airshed formed and caused, reduce airshed emotionally condition be just equivalent to add the pressure on ground in adsorption tower, if adsorption cycle and all press time constant situation can increase along with the reduction oxygen level of rate of discharge, but reduce rate of discharge further to certain value, can see from the graph when lower than 1.5L/min, because the oxygen of high density in adsorption tower can not flow out adsorption tower in time, the air newly entering adsorption tower is caused fully not adsorb, unnecessary nitrogen causes the reduction of oxygen level.
3) multifactorial association impact analysis
We study and find that it is not single for affecting oxygen level factor, and it is the coefficient result of multiple factor.Our research work mainly how under multifactor effect, to find optimal balance point.
A) adsorption cycle affects with all pressing associating of time: our experimental data remained on use table 1 and table 2 is done one group of adsorption cycle and all pressed the time to the graph of relation of oxygen level, as shown in Figure 5.The vertex of time effects oxygen level is all pressed to be do not change with adsorption cycle as can see from Figure 5 in graphic representation.All pressing in time 0 ~ 0.6S time period, the rate of rise of the most smooth adsorption cycle 5S and 11S of the rate of rise in optimal adsorption cycle is far longer than the slope of 8S, that is adsorption cycle and the best all press that time difference is larger to be changed more responsive to oxygen level, select the best all to press time and adsorption cycle that oxygen level variable effect can be made minimum.
B) adsorption cycle affects with associating of rate of discharge, as shown in Figure 6: tracing analysis: adsorption cycle 8S, when rate of discharge is less than 1.5L/min, also increase is had along with pressure increases oxygen level, start to become mild close to oxygen level change after the rate of discharge of 2L/min, because this time adsorption cycle and adsorption tower internal pressure match, in adsorption time, nitrogen is fully adsorbed, thus change rate of discharge obviously can not affect oxygen level.Adsorption cycle 5S, because air is short at absorption dwell time in the tower, now rate of discharge minimizing just adds tower internal pressure, so oxygen level can increase thereupon, and because now adsorption time is short after rate of discharge reaches 2L/min, tower internal pressure increases along with rate of discharge and reduces, and nitrogen is reduced by the capacity adsorbed, and therefore oxygen level also just increases along with rate of discharge and reduces.For adsorption cycle 11S, because switching time is long, after rate of discharge reaches 2L/min, because Nitrogen adsorption capacity is saturated, unnecessary nitrogen is because can not be entered by adsorbing in product oxygen, so oxygen level also can reduce.
C) all press the time to affect as can be seen from Table 1 with associating of rate of discharge, select the best all to press the time, rate of discharge does not almost affect oxygen level.Do not increase and all press the time, time rate of discharge is smaller, oxygen level is higher, along with rate of discharge increases, when being switched to the adsorption tower of desorption and regeneration, new tower at short notice oxygen level is lower, and the low oxygen content oxygen that all outlet ports flow enters more greatly oxygen container is more.
4) determine desirable adsorption cycle and all press the time
Data and theoretical analysis by experiment, has made adsorption cycle clear and has all pressed the relation of time and oxygen concn, determines desirable adsorption cycle and all the pressure time provides reliable foundation for us.
Along with adsorption cycle increases, producing oxygen concn first increases rear reduction, has an extreme point;
Having all pressure and nothing all to press affects comparatively large on producing oxygen concn, then slowly reducing, there is an extreme point along with all pressing time increase oxygen level first to increase.And optimum point is not mobile with the change of adsorption cycle;
Adsorption cycle, all change of pressure time and rate of discharge all have impact to oxygen level, and adsorption cycle is larger, more responsive to oxygen level change;
The factor of oxygen concn is affected respectively: adsorption cycle > all presses time > rate of discharge by data analysis.The adsorption cycle of preferred 3L/min oxygenerator be pickup time 7.8s, time of releasing is 6.2s, adsorptive pressure 1.8kPa.Or the adsorption cycle of 5L/min oxygenerator be pickup time 9.6s, time of releasing is 7.5s, adsorptive pressure 2.2kPa.
Proved by the experiment done on complete machine: 3L/min oxygenerator is when exporting oxygen flow 3.6L, and oxygen concn is 94%, and 5L/min oxygenerator is when exporting oxygen flow 5.5L, oxygen concn is 93%.Therefore can the value of setting be controlled about 90%, general user demand can be met.Final oxygen is transported in the environment of needs through strainer, oxygen flow meter, humidifying cup, oxygen exhaust successively.
The closed of each switch and valve is control by CPU, obtained oxygen, because parameters in oxygen preparation can change, or the reason of equipment causes error, the concentration of obtained oxygen is not invariable, therefore can be judged by the first oxygen sensor and the second oxygen sensor, when obtained oxygen concentration is greater than the value of setting, oxygen is stored in oxygen container, otherwise enter in air filter and carry out further filtering with the oxygen obtaining high density, equipment use is more flexible.3rd oxygen sensor is used for oxygen concentration real-time in feedback environment, facilitates CPU to control the closed of relief valve, and then maintains preferably oxygen concentration.
These are only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize specification sheets of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in the technical field that other are relevant, be all in like manner included in scope of patent protection of the present invention.
Claims (1)
1. a High concentration oxygen generator, it is characterized in that, comprise the air filter be connected in turn, admission air silencer, compressor, condenser, throttling valve, first point of gas control valve and second point of gas control valve is provided with between described condenser and throttling valve, described first point of gas control valve is connected with CPU with second point of gas control valve, described first point of gas control valve is connected with the first pneumavalve, described first pneumavalve is connected with the first adsorbing tower with molecular sieve, described second point of gas control valve is connected with the second pneumavalve, described second pneumavalve is connected with the second adsorbing tower with molecular sieve, described first pneumavalve is connected with exhaust snubber with the outlet of the second pneumavalve, equalizing valve is provided with between described first adsorbing tower with molecular sieve and the second adsorbing tower with molecular sieve, described equalizing valve is connected with CPU, described first adsorbing tower with molecular sieve is connected with the first oxygen sensor, described second adsorbing tower with molecular sieve is connected with the second oxygen sensor, described first oxygen sensor is connected with the 3rd switch with the first switch respectively, described second oxygen sensor is connected with the 3rd switch with second switch respectively, described first switch is connected with oxygen container by the first check valve, described second switch is connected with oxygen container by the second check valve, described 3rd switch is connected with air filter by the 3rd check valve, described first switch, second switch is all connected with CPU with the 3rd switch, the outlet of described oxygen container is connected with relief valve, strainer, oxygen flow meter, humidifying cup successively, and finally discharge through oxygen exhaust, described relief valve is connected with CPU,
Also comprise the 3rd oxygen sensor of oxygen concentration in measurement environment, described 3rd oxygen sensor is connected with CPU.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202864910U (en) * | 2012-10-18 | 2013-04-10 | 山东柯华健康科技有限公司 | Medical oxygen generator adapting to altitude environment |
| CN203006944U (en) * | 2013-01-09 | 2013-06-19 | 益阳市鸿达医疗器械有限公司 | Oxygen producing device of medical molecular sieve oxygenerator |
| CN203699902U (en) * | 2013-12-13 | 2014-07-09 | 科迈（常州）电子有限公司 | High-concentration oxygen generator |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202864910U (en) * | 2012-10-18 | 2013-04-10 | 山东柯华健康科技有限公司 | Medical oxygen generator adapting to altitude environment |
| CN203006944U (en) * | 2013-01-09 | 2013-06-19 | 益阳市鸿达医疗器械有限公司 | Oxygen producing device of medical molecular sieve oxygenerator |
| CN203699902U (en) * | 2013-12-13 | 2014-07-09 | 科迈（常州）电子有限公司 | High-concentration oxygen generator |
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